Push button lockbox



FIG. 1 is a front perspective view of a push button lockbox, showing ournew design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front perspective view thereof shown in an open position.

The broken lines shown in the drawings represent portions of the pushbutton lockbox that form no part of the claimed design.

CLAIM The ornamental design for a push button lockbox, as shown anddescribed.